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Viscosity Grade
Viscosity Grade Bitumen is mostly used as a Paving Grade and it’s suitable for Road Construction and for the Asphalt pavements producing with premier attributes. Viscosity Grade Bitumen is usually used in the production of Hot Mix Asphalt.
Viscosity Grade Bitumen has a thermoplastic feature which causes the material to Soften at High temperatures and to Harden at Lower temperatures. This temperature viscosity relevance is significant when specifying the performance parameters such as the adhesion, rheology, durability, and application temperatures of bitumen. In the Viscosity Grade Bitumen Specifications, the most important emphasis is based on the Bitumen ductility.
Gemini International. co has the capability to Export and Supply the Viscosity Grades Bitumen in compliance with National and International standards.
Viscosity Grade Bitumen
| Specification | Acceptable Range | Result | Test Method | Explanation |
|---|---|---|---|---|
| Absolute Viscosity | Min 800 | 1164 | ASTM – D4402 | at 60°c , Poises |
| Kinematic Viscosity | Min 250 | 287 | ASTM – D4402 | at 135°c , c.st |
| Ductility | Min100 | >100 | ASTM – D113 | at 25°c , cm |
| Solubility | 99.0 Min | 99.8 | ASTM – D2042 | in CCL4 , % |
| Specific Gravity | 1.01-1.06 | 1.01 | ASTM – D70 | at 25°c |
| Spot Test | Negative | Negative | T102 | in Naphtha |
| Flash point | 220 Min | 334 | ASTM – D92 | °c |
| Penetration | 80-100 | 91 | ASTM – D5 | at 25°c , mm/10 |
| Softening Point | Min 40 | 45.2 | ASTM – D36 | °c |
| Characteristics | Unit | VG 30 | Test Method |
| Absolute Viscosity @ 60 °C, Poises | °C | Min.2400 | IS 1206 (Part 2) |
| Kinematic Viscosity @ 135 °C | cSt | Min.350 | IS 1206 (Part 3) |
| Softening Point (R&B) | °C | Min.47 | IS 1205 |
| Flash Point (Cleveland Open Cup). | °C | Min.220 | IS 1209 |
| Solubility in trichloroethylene. | % | Min.99 | IS 1206 |
| Penetration @ 25 °C (100 grams, 5 seconds) | 0.1 | 50-70 | IS 1203 |
| mm | |||
| Test on residue from thin film oven tests/RTFOT | |||
| i) Viscosity ratio @ 60 °C | °C | Max. 4.0 | IS 1206 (Part 2) |
| ii) Ductility @ 25 °C, (Thin film oven test). | Cm | Min.40 | IS 1208 |
| Specification Gravity @ 27/27 | °C | Min.0.99 | IS 1202 |
| Conforms to BIS (IS 73:2006) Specifications | |||
| Specification | Acceptable Range | Result | Test Method | Explanation |
|---|---|---|---|---|
| Absolute Viscosity | Min 3200 | 3912 | ASTM – D4402 | at 60°c , Poises |
| Kinematic Viscosity | Min 400 | 426 | ASTM – D4402 | at 135°c , c.st |
| Ductility | Min100 | >100 | ASTM – D113 | at 25°c , cm |
| Solubility | 99.0 Min | 99.87 | ASTM – D2042 | in CCL4 , % |
| Specific Gravity | 1.01-1.06 | 1.028 | ASTM – D70 | at 25°c |
| Spot Test | Negative | Negative | T102 | in Naphtha |
| Flash point | 220 Min | 344 | ASTM – D92 | °c |
| Penetration | 40-60 | 47 | ASTM – D5 | at 25°c , mm/10 |
| Softening Point | Min 50 | 53.6 | ASTM – D36 | °c |